We might oc it, but we wont go for extreme oc. The build looks good, however, my friend want to spend all 1600$ on this build, so he want everything he can get from that 1600$. 1163,67$ is not good enough for him. ^^
If you're paying $1600 for a gaming rig you should be prepared to overclock. Burritobob has a good build but dual 680s on this budget should not really be considered if you don't have monitor or peripherals. I don't recommend cutting corners (cheap case, no SSD) to get something that doesn't make sense to the build.